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Catalysts 2018, 8(12), 606; https://doi.org/10.3390/catal8120606

Criticial Assessment of the Photocatalytic Reduction of Cr(VI) over Au/TiO2

1
Leibniz-Institute for Catalysis, Albert-Einstein-Str. 29a, D-18059 Rostock, Germany
2
School of Chemical Engineering, Hanoi University of Science and Technology, Dai Co Viet Street no.1, 100000 Ha Noi, Vietnam
3
Institute for Chemistry, University of Rostock, Albert-Einstein-Str. 3a, D-18059 Rostock, Germany
4
Department of Life, Light and Matter, Interdisciplinary Faculty, University of Rostock, Albert-Einstein-Str. 25, D-18059 Rostock, Germany
*
Author to whom correspondence should be addressed.
Received: 3 November 2018 / Revised: 19 November 2018 / Accepted: 23 November 2018 / Published: 3 December 2018
(This article belongs to the Section Photocatalysis)
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Abstract

The purification of drinking water is one of the most urgent challenges in developing countries, for which the efficient removal of traces of heavy metals, e.g., Cr(IV), represents a key technology. This can be achieved via photocatalysis. In this study, we compare the performance of Au/TiO2 to bare TiO2 P25 catalysts. Furthermore, the influence of the sacrificial reagent citric acid under UV-Vis and Vis excitation was investigated and a detailed investigation of the catalysts before and after reaction was performed. During the photocatalytic reduction of Cr(IV) under acidic conditions, both leaching of Au, as well as absorption of Cr, occur, resulting in new catalyst systems obtained in situ. View Full-Text
Keywords: photocatalysis; Au/TiO2; Cr(VI) reduction; citric acid; adsorption photocatalysis; Au/TiO2; Cr(VI) reduction; citric acid; adsorption
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Ngo, A.B.; Nguyen, H.L.; Hollmann, D. Criticial Assessment of the Photocatalytic Reduction of Cr(VI) over Au/TiO2. Catalysts 2018, 8, 606.

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